78086497 has 2 divisors, whose sum is σ = 78086498. Its totient is φ = 78086496.

The previous prime is 78086471. The next prime is 78086501. The reversal of 78086497 is 79468087.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77510416 + 576081 = 8804^2 + 759^2 .

It is a cyclic number.

It is not a de Polignac number, because 78086497 - 2⁷ = 78086369 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78086497.

It is not a weakly prime, because it can be changed into another prime (78086467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39043248 + 39043249.

It is an arithmetic number, because the mean of its divisors is an integer number (39043249).

Almost surely, 2^78086497 is an apocalyptic number.

It is an amenable number.

78086497 is a deficient number, since it is larger than the sum of its proper divisors (1).

78086497 is an equidigital number, since it uses as much as digits as its factorization.

78086497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 78086497 is about 8836.6564378163. The cubic root of 78086497 is about 427.4237466448.

The spelling of 78086497 in words is "seventy-eight million, eighty-six thousand, four hundred ninety-seven".